6.45 Is exposure to a chemical in Teflon-coated cookware haz- ardous? Perfluorooctanoic acid (PFOA) is a chemical used in Teflon®-coated cookware to prevent food from stick- ing. The Environmental Protection Agency is investigat- ing the potential risk of PFOA as a cancer-causing agent (Science News Online, Aug. 27, 2005). It is known that the blood concentration of PFOA in the general population has a mean of μ = 6 parts per billion (ppb) and a standard deviation of σ = 10 ppb. Science News Online reported on tests for PFOA exposure conducted on a sample of 326 people who live near DuPont's Teflon-making Washington (West Virginia) Works facility. a. What is the probability that the average blood con- centration of PFOA in the sample is greater than 7.5 ppb? b. The actual study resulted in x = 300 ppb. Use this in- formation to make an inference about the true mean (u) PFOA concentration for the population that lives near DuPont's Teflon facility.
6.45 Is exposure to a chemical in Teflon-coated cookware haz- ardous? Perfluorooctanoic acid (PFOA) is a chemical used in Teflon®-coated cookware to prevent food from stick- ing. The Environmental Protection Agency is investigat- ing the potential risk of PFOA as a cancer-causing agent (Science News Online, Aug. 27, 2005). It is known that the blood concentration of PFOA in the general population has a mean of μ = 6 parts per billion (ppb) and a standard deviation of σ = 10 ppb. Science News Online reported on tests for PFOA exposure conducted on a sample of 326 people who live near DuPont's Teflon-making Washington (West Virginia) Works facility. a. What is the probability that the average blood con- centration of PFOA in the sample is greater than 7.5 ppb? b. The actual study resulted in x = 300 ppb. Use this in- formation to make an inference about the true mean (u) PFOA concentration for the population that lives near DuPont's Teflon facility.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Make the explanation concise, if you can. I don't want to have to write more than a couple pages.
Transcribed Image Text:6.45 Is exposure to a chemical in Teflon-coated cookware haz-
ardous? Perfluorooctanoic acid (PFOA) is a chemical used
in Teflon®-coated cookware to prevent food from stick-
ing. The Environmental Protection Agency is investigat-
ing the potential risk of PFOA as a cancer-causing agent
(Science News Online, Aug. 27, 2005). It is known that the
blood concentration of PFOA in the general population
has a mean of μ = 6 parts per billion (ppb) and a standard
deviation of σ = 10 ppb. Science News Online reported
on tests for PFOA exposure conducted on a sample of 326
people who live near DuPont's Teflon-making Washington
(West Virginia) Works facility.
a. What is the probability that the average blood con-
centration of PFOA in the sample is greater than
7.5 ppb?
b. The actual study resulted in x = 300 ppb. Use this in-
formation to make an inference about the true mean
(u) PFOA concentration for the population that lives
near DuPont's Teflon facility.
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